Nope, just Cassini and NASA doing any CGI. FYI, these images are always highly cleaned up false color composites.

Images taken on Oct. 11, 2005, with blue, green and infrared (centered at 752 nanometers) spectral filters were used to create this color view, which approximates the scene as it would appear to the human eye. (link)

Doesn't make it any less amazing to me though, but more so, as there's all this SCIENCE going on to get the pretty picture!